If there was a bl2, it wouldnt be torque. There likely isnt much further he can go with the game unless its just updating current bl with basic content addons.
A new bl woild have to be huge, big engine, big graphics, and it would require a known userbase beforehand to make it worth the effort lol.
Its a gamble. Not likely to happen.
If he did a kickstarter needing like 100k(?) to produce the game, that in itself would help sell bl1 lol. And it could gauge a reaction we all wanna see :p