I don't really want a sequel for Pokemon Snap but i'm not against it. From what I've watched of the game it's just taking pictures of pokemon and your goal is to take pictures of mew... I think.
Pokemon Snap is basically one of those games you have to play for yourself to truly understand. The premise is simple and the game is short, but it's easy to get hooked onto taking better pictures, beating scores, discovering new Pokemon and new techniques, and composing an album of your favorite photos. I'm not entirely sure I can fully recommend the game for the Wii's Virtual Console because of its brevity, but you won't find a similar game anywhere.
Yes, it'd be bloody fantastic with the WiiU pad and the panoramic view, it'd be the best puzzle game and pokemon game ever! Especially in HD! Make it! Make it nooooooooow, i've been waiting so long.
Both the Wii U and the 3DS would make excellent use of Pokemon Snap's features. The 3DS could take pictures in stereoscopic 3D, and its built-in gyroscope could allow players to actually move the handheld to aim and take photos if they so desired. The Wii U, on the other hand, supports HD graphics and also has a gyroscope, and - this is completely conjecture - would make multiplayer functions easier to access. Motion controls with the Wii Remote could also increase the immersion. I agree with you; it's been well over ten years since a unique game with no equal, and there's been no talk of a sequel that would come so naturally.
Also, "bloody fantastic"? Just out of curiosity, are you British?
I believe the player should be able to roam freely, but have some levels/areas be set on a guided course. Therefore giving a balance between linearity and non-linearity. This would allow the player to find secrets, shortcuts, and Pokémon that can't be found elsewhere in the game. That's just me, I'm sure others have better ideas or more in-depth opinions than I.
That sounds like a good balance. Free-roaming allows for more options and control, but guided paths rely a bit more on strategy and timing. As musicfan suggested, drawing your own routes could add another layer to the game.
And for Nintendo, yes, I expect all current Pokemon in the game. The first game was a bit more acceptable in its small use of Pokemon because of the limited technology available (and probably low budget, if I'm not incorrect), but the 3DS and Wii U are powerful machines. It's going to require a lot more time and money, but it would be worth it, especially to those of us who experienced the first game.
Regardless of which system or mode of transport they use, I think Nintendo has every excuse to craft a sequel. Maybe we need an Operation Poke-Fall to bring the point up more.