It can really only be 2
Bmi regional doing German routes in conjunction with LH
Or
BA cityflyer opening up to fly city routes such as Madrid, Frankfurt, Lisbon as examples....
Like i said though if it is Cityflyer you can put money on it BA would move up also from BHD, say what you will but IAG are hitting finances hard and I can't see them paying for 2 contracts with 2 airports and all the ticket desk costs with 2 airports 30 mins from each other.
I'm just saying if it is BA expect it to happen