No he won't because he's the biggest and most genuine Eurosceptic in parliament and has had years sitting on the fence on this now. It's STILL about another bloody general election and not Brexit again. I still believe Boris is just pro Brexit for political reasons; Corbyn is the real Brexiteer.
The sheer arrogance and pig-headedness of Corbyn is staggering and painful to watch. A general election is the last thing anyone should want now. The government is so weak now that it's difficult for them to do anything. Make do with that.
The Brexit party only exists to blackmail Conservatives into wrapping up Brexit fast. Much as I despise Farage, I don't believe he's dumb enough to do the massive own goal of running MPs against the Tories in a ge if Boris is commited to leave with no deal.
What we'll see is Brexit party endorsing Boris and not standing and the rest of the vote split so much it will be devastating. Lib Dem areas will get a boost in the vote. Labour areas will have their vote split by (genuine) Brexit parties and could lose a LOT of seats to the Tories.
Corbyn seems to think he'll walk it, and people will be singing "Oooh Jeremy Corbyn" in the streets again; he seems oblivious that there's a genuine possibility that another general election could literally wipe out Labour entirely.