Its established that Betty isn't going to be She-Hulk very soon after the mini ends, as its stated in the mini SHIELD is going to somehow reverse the process for her (something that can't be done for Bruce because the "Hulk/Super soldier serum" has bonded to Banner's DNA).
Fury actually says that they're trying to reverse
engineer the process, which I took as meaning that they're trying to find a way to duplicate and reproduce it, not undo it.
This makes sense- the previously unheard of Jennifer Walters quickly and casually achieved what Fury's whole super soldier think tank has been trying and failing to do; made a useable formula that can give Hulk-level strength and power to anyone, on demand, without the downside of immense stupidity, no self-control and homicidal rage (something Banner himself has kind of achieved through meditation etc, which itself you'd think warranted further investigation).
Presumably this hasn't worked though, as no Hulk Army appeared to help save the day in Ultimates 2, or indeed Ult*****m. And Jen Walters seems to have disappeared into the same limbo as Mar-vell, Sam Wilson etc. (If Loeb remembers, he'll probably have had her killed, gutted, grilled and eaten off-panel by now).
Yeah, I enjoyed Ult Wolverine V Hulk overall, but the ending was a bit lame, as Bass says. It doesn't really tie into U2 either- in that, Betty is neither She Hulk nor in a holding cell, she's still got the same high official position as before and is
holding hands with Fury when the invasion hits, so there was certainly no residual animosity between them...
Ultimately (ha...) who cares? As a self-contained mini this was good fun, but we all know it'll never be referenced again and all continuity in the Ult U has been shot to hell since this thing started anyway.
...and why do they need to reverse engineer she-hulk when Jen Walters came up with a serum that will do the trick for anyone, hamsters, rabbits, whatever?
....and when did Betty/Shulk get to put her panties on mid-battle with Wolverine, between pages 6-9? Big knickers, too.
... and why in Ult 2 did they decide the way to execute Banner/Hulk would be to chain him to a ship and drop a nuke on him? Why didn't they just shoot him in the head while he was tranquilised unconscious?
...and on page one Logan makes a big deal about how he's never had to go through a "^&$%*ing airport" before.
The first time we ever see him, in Ult X-Men #2, he's going through a ^&$%ing airport! (and he gets asked the same question).
...and, and, how does Ultimate Power fit in with
anything?