I personally think that, after playing games that require too much thinking, a rail shooter is a gamer's way of relaxing the mind in a casual and arcade-y sort of way.
This is why I hope games like Dead Space Extraction and Sin and Punishment 2 make it big here when they're released.
The folks at Treasure must've realized the huge sales for their virtual console release, and brought the fans what they wanted. Even the small trophy nod in Smash Bros Brawl might've been a sign or, better yet, an asset from this game. But if you enjoyed the first game, expect more of the same in this sequel!