Good, Sessions is a terrible person. I knew from the start that he'd be in Trump's initial administration, and I hated it. I hope he stays out of politics for good.

Trump's first priority in AG will be loyalty. Rand Paul has been careful to appear 100% personally loyal to Trump (while still expressing disagreements), and could conceivably be asked; while he's probably in a better position as senator, he'd be a very good AG.

I wouldn't be shocked if Trump picked one of his sons, even though that'd look super bad. Or Guiliani, maybe.

A really good political move would be to appoint a registered Democrat who has so far resisted the Russia hysteria. But it's unlikely.

Trump is bad at picking people, so the new AG might end up causing him the same issues. But it'll be difficult to find someone worse for the country than Sessions.