It's definitely not FF2. Tadpole Treble's been in the works for long awhile now, it's creator is somebody already known to the public (The guy behind Brawl in the Family) so the developer's almost-certainly not a front for TwinBeard, and it had a Kickstarter of its own to get funded. KS doesn't let anyone do a second campaign for a funded project.
The game still looks good, though! I'm hoping to pick up the Wii U version coming up here. But despite being amphibian-themed and Indie (Which definitely makes it suspicious!), it's one of the few Indie games on the market where I can confidently say that it isn't FF2.