I don't foresee any problem, the game that just went on hiatus, the last session was very similar. The DM was like "ok, so you killed the Voidspawn (a strange critter that was living inside a Sphere of Annihilation!) and while there's a few encounters left, I think you guys could take them easily, so I'll just give you the xp and treasure you'd get from them."
Then we went back to town, rested for the night, and all hell broke loose as the final villain completed his plan (that we didn't really have much chance of stopping) and had to go back to the dungeon (now in ruins) to fight him.
Everyone seemed alright with skipping past those last couple encounters, so I imagine everyone will have a similar reaction. I suppose it depends on when all this happens- if the big fight happens early in the session, I could run those encounters, but finishing up the adventure and setting up the next one sounds more interesting to me.
Or I could say "ok, if you guys really want to fight more drow and ogres, we could..." and I'm willing to bet by that point they'll be beyond sick of drow and their stupid stupid poison, lol.