At times like this I almost regret pitching a couple of Enterprise-era books...
(Then again, they're both set during the series, not after)
Back to the drawing board, eh?
Not necessarily. Just make them occur as close to the end of the series as possible, to be in a position to leap over the relaunch Romulan war novel series all together. A bi-pass procedure like in 'Hitchhiker's Guide to the Galaxy'.