...sort of. I have this horrible feeling that if they DID make a sequel, it'd have some godawful gimmicky gameplay mechanic, and whilst I am all for innovation, in this instance I'd rather Nintendo just stuck to the formula as closely as possible. The thought of having a Pokemon Snap game on the 3DS similar to the Dream Radar, where you take pictures of Pokemon with the 3DS camera, makes me shudder, and that is exactly the kind of thing I can see Nintendo doing. Or, alternatively, one that involves using the Wii U gamepad like an actual camera in conjunction with the TV screen. Neither sounds appealing to me, and both sound likely, so if they are at all likely, I'd prefer it if they didn't bother.
As a side note, if they were going to make a sequel, I'd rather they didn't unless they intended to include every Pokemon, as well. Not being able to obtain everything in the most recent Mystery Dungeon game and the Ranger titles was bad enough; it makes the games feel incomplete.