Heh, heh... I think the 1e and 2e versions were quite similar, except for the list of monsters from which summoned monsters were chosen... (But hopefully we get to choose and modify, anyway

)
Anyway, besides the monster summoning spells, we have a few other conjuration spells as well (conjure elemental, etc.), which all work somewhat differently (I think having the "this spell backfires" thing will be difficult).
But anyway, having summoning work will give us a whole slew of new spells almost right away