My gut feeling is a hung parliament or a slim Conservative working majority (still can't see a Labour victory), which will in turn push Labour back towards the centre.
After another five years of the Cons. in power with the turbulence that Brexit will bring, the population will move away from them and the centre will attract.
I've said it before: a Blair like figure (even with his numerous negatives) would whitewash this elections, whereas we're left with two more extreme leaders.
With regards to Labour moving back to the centre, I doubt it.
There wasn’t a plausible centrist figurehead in 2015 and there isn’t now (in fact they have only grown weaker since); no work has been done (unlike after 1992) to explain why they lost, to develop a candidate or even begin to identify an alternative set of policies - and even if someone did exist and they had a policy programme, the cost of doing what Blair actually did (getting the papers onside) is deemed as too excessive now (TBF it probably was then too, but people didn’t realise what he’d done).
The next Labour leader is almost certainly going to come from the current Shadow Cabinet, which probably means Labour will continue down the path it is on. This is the right thing to do, because if this election tells us nothing else it’s that Labour needs to reconnect with the people it is meant to represent. Corbyn for all his faults at least began to do that, the next leader will have to do more in that regard.