My only guesses IF there really are new routes;
Eurowings with a German route,
WOW to Kef and on to US and Canada,
BA on LCY,
Would bmiregional look at EU points on their current
network too thin for 737/319/320?
Cork with Stobart, resurrection of an old route?
Eastern increase on IOM.
Unless Icelandair's routes connect to addition US points, would that form the basis of an announcement.
If there is anything new, it will be in the above....
..so long as the airport holds on to its LHR service, that should be no. 1 priority...