UFO in Super Mario 3D Land?

Atlas said:

I think this is hint for SMG3 for 3DS
could this be the guys from shiverburn galaxy?
Olook an easter egg that doesn't hint at anything

Not that I think it's lame or anything like that, but I don't think it's supposed to be some kind of reference to a future game.
I don't think it has anything to do with the Mario and Luigi games, just a little easter egg. The Mario RPG games are rarely or maybe even never referenced or connected to other Mario games.
How did they put the UFO In? :???:
I played SM3L and I tried UFO in this video, I saw it and it looked perfect like UFO, I had to wait for 1 min to see UFO
Shiverburn has the HellValleySkyTree people
I think this is just some guy being paranoid about a random object in the sky. I mean it could have been some random mistake in the sky's texturing for the level.

...wait now im being paranoid
That UFO Looks Awesome