By virtue of it being one route ( unless that's wrong) unless Ryanair come in with one route ( most unlikely despite near constant training for weeks ) it's a bet between Flybe and Wizzair.
Ideally Flybe as they have aircraft sat idle.
An ideal route - somewhere not served ( Rome was a good suggestion ) for example but one with high frequency if poss x7 weekly .
That might restore the couple of lost routes .
Or Loganair to ABZ . Not much of a route but again with good frequency and their statement intending to target all North English airports .?.
Just wait and see.