Epic levels rules here...

[Luvian]

Here are some quotes from the Epic Level Handbook.

Class and Level bonuses

Epic character -those whose character level is 21st or higher- are handled slightly differently from nonepic characters. While you continue to gain most of the benefits of gaining levels, some benefits are replaced by alternative gains.
Despite the 20th-level limit indicated in the Player's Handbook, you can advance a class level beyound 20th by using the rules in this book. YOu can also advance the class level of a ten-level prestige class (such as those presented in the Dungeon Master's Guide) beyound 10th level, but only if your character level is already 20th level or higher. You cannot advance the class level of a class with fewer than ten levels beyond the maximum described for that class, regardless of your character level.

Epic Save Bonus: Your base save bonus does not increase after your character level reachs 20th. However, you do receive a cumulative +1 epic bonus on all saving throws at every even numbered level beyound 20th. In other words, you have a +1 epic bonus on all saving throws at 22th level, a +2 epic bonus on all saving throws at 24th level, and so on. To qualify for any feat that requires a minimum base save bonus, use the sum of your base save bonus and epic save bonus.
Epic Attack Bonus: Similarly, your base attack bonus does not increase after your character level reaches 20th. However, you do reveive a cumulative +1 epic bonus on attacks at every odd-numbered level beyound 20th. (Luvian's note. Those are not base attack bonuses. They don't raise your number of attack. They are simply a generic bonus like the bonus received from magical weapons.)
Feats: Every character gain one feat (which may be an epic or nonepic feat at the player's choice) at every level divisible by three (21st, 24th, 27th and so on). These feats are in addition to any bonus feats granted in the class descriptions later in the chapter.
Ability Increases: Upon gaining any level divisible by four (20th, 24th 28th, and so on), an epic character increases an ability score by 1 point.

Epic Fighter

The epic fighter is a combat machine, a master of more battle maneuvers than any other character in the game. More than a mere sword-swinger, the epic fighter know how to best his opponents in any area.

Like the class name say, you're all about fighting, so there's no point in ignoring Epic Weapon Focus and Epic Weapon Specialisation. However, the epic fighter who forget to pick up defensive abilities may not live to regret it. Think about Epic Tougness and Armor Skin (or Damage Reduction and Fast Healing if you meet the prerequisites). Because your saving throws, particularly against most spells, are your weak point, consider Spell Resistance and Epic Resistance.

Strength is the ability score you should increase, thought you should boost Dexterity if you favor ranged combat. Extra hit points always help, so Constitution is a good occasional choice as well.

Other Options:The fighter who focuses on ranged weapons can ignore a little defense in favor of offensice feats such as Uncanny Accuracy and Hail of Arrows. You might also consider pursuing Dodge And Expertise feat progressions if you've previously disdained them. Eventually, you can gain Improved Whirlwind Attack.
Hit Dice: d10.
Skill Points at Each Additional Level:2+ Int modifier.
Bonus Feats: The epic fighter gains a bonus feat (selected from the list of epic fighter bonus feats) every two levels after 20th.

Epic Fighter Bonus Feat List: Armor Skin, Combat Archery, Damage Reduction, Devastating Critical, Dire Charge, Distant Shot, Epic Endurance, Epic Leadership, Epic Prowess, Epic Toughness, Epic Weapon Focus, Epic Weapon Specialisation, Exceptional Defelction, Improved Combat Reflexes, Improved Manyshot, Improved Stunning Fist, Improved Whilrwind Attack, Infinite Defelxion, Instant Reload, Legendary Commander, Legendary Rider, Legendary Wrestler, Overwelming Critical, Penetrate Damage Reduction, Perfect Two-Weapon Fighting, Reflect Arrows, Spellcasting Harrier, Storm of Throws, Superior Iniative, Swarm of Arrows, Two Weapon Rend, Uncanny Accuracy.
In addition to the feats on this list, the fighter may treat any feat designated as a fighter bonus feat, but not listed here, as being on his bonus feat list.

[SpiritWarrior]

Hey thanks, this should be useful for HOtU. Damn, look at all those feats!

[WOLFGIR]

Most troubling will be how they solve the Epic spellcasting though..

I wonder if they will make a "bioware version" or if they will stay close to the core here.
Personally I wouldn't mind a Bioware version since the game is so action based.

I guess even game developers should never say never after all