Bill’s Master Plan?

So when we first see Time Baby, his hourglass symbol is red and he’s in the process of destroying a city some time in the future.

When we see him again at the end of The Time Traveler’s Pig, his hourglass symbol is blue and it’s also blue when he shows up again in Blendin’s Game (though it does turn gold when Globnar concludes). One might assume that this is because he isn’t in “attack mode”, but he manages to kill a member of the arena’s audience without his icon changing hues.

During his recent AMA, Bill Cipher expresses both hatred for Time Baby and a strong desire to possess a physical vessel powerful enough to meaningfully act on that hatred.

Could that be Bill’s endgame then? Somehow take control of Time Baby as he did with Dipper so he can have his revenge AND ravage all of existence with sweet temporal\ abilities of mass annihilation?

Isn’t everything all shapes in the end?

What’s a bowtie, but a horizontal hourglass?

What’s an hourglass, but two triangles stuck together?