I will wait for the actual issue, but usually, these kind of piled up specials with big sized creative teams of big names are not my cup of tea. They rarely give me any story that I like.
I don't have a problem with someone else getting the AK name, if they write a good story for it, even if I think it's too soon for someone else to recycle that mantle. I wouldn't have a problem either with Jason going by it if it's out of continuity or a flashback or a flashforward with a good story behind.
I would do have a problem with it if they have Jason in this current continuity, by now, go by that name, costume and, well, background? Mood? Tactics? Something like that. I cannot find the right word. It would break and crash what we're reading in his own book. That would annoy me, most probably.
But I suspect it's going to be someone else: I'm going for Slade, for Deathstroke. Fits the military approach, he's full tacticool, has a story with the alias somehow and it's currently in Arkham if I'm not mistaken. It wouldn't be too wild of a guess, I think.