Well, I dunno if I'd shoot myself if Vic didn't return as Ed, but I would rage.
Rage a LOT.
& then probably cry after I was done raging. >_>
I don't think there's much hope for Aaron voicing Al again, though. Apparently a lot of people on the actual FUNi boards think it's pretty impossible.
However, I'm sticking to my theory until it's proven wrong.
Which is that Aaron is a voice actor for a reason.
There's been plenty of conventions where he's had to quote FMA lines, same as Vic, and he can still pull off Al's voice perfectly fine. D: I really hope Funimation at least considers keeping him as Alphonse, instead of just going 'Nope! Too old,'. I guess that depends on whose casting the VO's this time around.