I don't know if they are going to be so clean as this, but I wouldn't be surprised if we do get more themed bundle UAs. Then again, the Forgotten Realms book only had three reprints (knowledge, bladesong, and PDK) and a swath of new subs. We could very well end up with a UA around some theme...
I wouldn't mind a 2e style Tome of Magic, a collection of new spells and a few new PC options (the original wild magic). Make a book with a bunch of new spells, magical subclasses and feats, magic items, and a few magical monsters. Toss in some bastion stuff and you got a good $30.00 supplement.
The problem is that the wizard can't be both a generic "master of all Arcane magic" AND a super-flavorful specialist without going OP. The fact they can pick all the best arcane spells and then be a great necromancer or summoner doesn't work.
This is a good example. A generic wizard doesn't...
...
I don't think we have.
Artificer: 6
Barbarian: 0
Bard: 2
Cleric: 3
Druid: 0
Fighter: 2
Monk: 1
Paladin: 1
Psion: 4
Ranger: 2
Rogue: 2
Sorcerer: 3
Warlock: 2
Wizard: 5
There is a decently exploitable gap in martial based and primal based subs waiting to be explored.
I think the Hexblade revision puts a stake in the heart* of an October Ravenloft book, unless it was never intended for it or has been cut for later from it. I won't say never, but my money is increasingly that the October book is vaporware or delayed and these new UAs are all for 2026. (Either...