Get ready for a Big surprise

An image of the guys from Game Grumps holding a Big the Cat doll appeared on the official Sonic the Hedgehog Twitter and Facebook pages today, along with the message, “We've got some pretty exciting stuff planned for the year, so stay tuned.”

You might also notice the numbers “4 3 1 21 16” placed inconspicuously at the bottom of the image. What could they mean? Is this some kind of secret code like the one from Lost? I'm guessing it means it's probably a joke (April 1, 2016), but what about the 3 and the 21?

But most importantly, there's Big the Cat, which is perhaps a super exciting implication that we're finally getting a Big the Cat game for Sonic's 25th anniversary. Who's ready for more Big?

...Anybody?