I predict Flybe will operate flights to Belfast, and possibly Glasgow (Loganair also a possibility), though I'd say Stobart Air could be the operator.
Blackpool and Gloucestershire will most likely be scrapped for good, though clearly there is quite impressive demand for both routes.
Eastern Airways could possibly take over Newcastle, but I suspect it will be scrapped.
The 2016 passenger figures for these routes are as follows;
Belfast City: 23,424 (up 17%)
Blackpool: 15,750 (up 52%)
Glasgow: 7,952 (down 20%)
Gloucestershire: 11,824 (up 1%)
Newcastle: 4,191 (down 5%)