DommyDom, PMI will be the only new route this Summer ex MAN. However you, and others, seem to be disappointed at the U2's route network out of MAN. A 6th based aircraft is being added this Summer which will be used all day, day in day out operating a total of 22 routes plus the GVA (operated by LPL) with 5 of those aircraft and 21 of the routes being launched in the last 3 years.
Now, don't misunderstand me, a couple of the "lost MAN routes" would be nice to replace and perhaps some off the beaten track destinations but it's no good if they are going to be carting around fresh air or if the capacity within Easyjet (alot of competition from European bases for a/c-only MAN and LGW will grow in UK this year) and so we are still likely to see more mundane routes that carry alot of people paying the correct fares.
That said, possibilities in the pipeline are BIO, OPO and VCE. As I understand, GOT isn't during great at the moment.