Redbubble question

Hey guys, so i drew my own sentinel design based on both the bungie guardian and the 343 guardian, plus some other creative liberties. Below is a link to the image.

And i wanted to know if, since this design does not exist in the halo universe and could technically pass on its own as a seperate thing, would it be okay to post on redbubble? Although, the halo inspiration is very obvious so would i be crossing a line by posting it?

Your particular design looks more ‘inspired-by’ rather than ‘taken-from’ Halo. It’s original art, in my opinion you should be fine, although this kind of advice (especially when involving money) should not be advised by strangers on the internet.
In the future, interpret and follow these rules on your own: