Don't think TOM will drop PRG because of Sky Europes' intervention. In fact, in someways, it actually enhances the destination by making a day trip possible, if you travel outbound on one airline, and return inbound by the other.
Heard that an additional TOM airframe will be based at LTN from May 08, a new 738. However, with no FCA based from Oct 07, overall much the same but more Ws, inbound, than this year.