Yes, you read the title correctly. I think that both Moana and Gurren Lagann exist in the same universe. Why do I think that?

First things first: SPOILER WARNINGS for the following:

• Tengen Toppa Gurren Lagann: an 18 year old anime

• Moana: a 9 year old movie

• Moana 2: This one is just a few months old, this one is acceptable