I don't know tbh. May is weak - Tories have been talking about a leadership challenge after the summer (big question is who?). I'm pretty sure they'll fight like grim death not to have an election though. I don't know to what degree that'll be possible if Labour does manage to sink some of their key legislation. Labour would still have to win 65 seats (IIRC) to form a majority govt so the possibility of a Corbyn government is very unlikely.
More on Assad-cheering fascists at the top of Labour here:
https://order-order.com/2017/07/12/top-corbyn-aide-sided-with-assad-and-putin/ (yes, it is a Guido Fawkes link but the tweets are all genuine). This dude asked an Arab activist I know (Oz Katerji) "do you support Al-Qaeda?". Oz commented afterwards that he'd never experienced outright bigoted abuse like that from the Tories.
I think JC and his supporters will shape the culture of the party for a long time. In a lot of ways, they flourish in opposition, doing best when insulated from the realities of being in power.
What I find sad is that I can imagine an alternate recent past where the Left saw past its collective blindness and supported the revolution in Syria. It could've been a popular cause, just as the struggle for Palestinian rights is. Instead we've got blank ignorance at best and active support for genocide and war crimes at worst.