As many have said, it looks exactly like the pre-rendered animations of the SNES intro. The original still looks better but this doesn´t bother me at all. My biggest worries are music and gameplay. The first Yoshi's Island has one of the most memorable soundtracks of that generation and most Nintendo current OSTs are pretty much bland crap since Koji Kondo is not handling them, they seriously need new talent in that department.
Regarding gameplay, I'm worried because the Yoshi franchise is aimed at smaller children these days and I fear an extremely easy game with bland level design. This was the worst sin of Yoshi's Story, for example, which was otherwise a great idea executed poorly.