Did they confirm that Devoid would come back? I mean, it makes sense, just asking.
We'll see, but I very very much doubt it. Unlike BFZ block, there's absolutely nothing in SOI that cares about colorless or would interact well with it.
Besides, they have two other techniques to make colorless creatures in this set: they can just print straight-up colorless cards (Emrakul's number makes it pretty clear there's probably like 10 of these) or they can print colored cards that flip to colorless, which is honestly a more elegant solution than devoid ever was.
So the Gisela-Bruna monstrosity will probably be a devoid UR Eldrazi Angel legendary creature right?
Less crazy option: izzet or jeskai legend that flips into a colorless Angel Horror.
More crazy option: standalone legends for Gisela and Bruna that collectively flip into a single colorless Angel Horror. The proportions of the art would fit!
I can't imagine jumping through the fuckload of hoops required is ever gonna be worth it. It's 2 different hoops to jump through simultaneously - getting 7 mana and getting 6 types in your yard.
I mean I don't think they were necessarily hoping to make Nahiri -> Emra2l a defining Standard deck or anything, they just want it to work so that if you do assemble the combo it fits with the story. Nahiri summoning Em 1.0 in Modern, while the newer one doesn't become oppressive in Standard, is honestly probably the best result they could hope for.
On another note,
today's Making Magic article is interesting, providing 25 random facts about Magic history. I wasn't aware that Sixth Edition was advertised as "Classic", forcing them to change the name of Type 1 from Classic to Vintage; or that Coldsnap was designed in only six weeks
I'm so freaking old, I already knew almost everything in this list. (I'm not sure anyone has told the Urza's Odyssey story before.) So old.
The Coldsnap story is especially hilarious to me now that we're finally going to close the loop and just get our first regular, non-special-at-all summer expert expansion. Looking back on it all their attempts to solve this problem it's just kind of hilarious how hard they worked to avoid the obvious solution, generally to their detriment: Unhinged kind of bombed, Coldsnap was shat out in five minutes and screwed stuff up for the Time Spiral team, Eventide was ill-conceived at every level, and the core set was just never something exciting for people.