Just out of curiosity, what was your ending? In mine i didn't pay the fine, so the Nova thing shut down my ship
But I think there are different endings.
After we beat the Grand Purifier, there was a big celebration and all the major NPCs were there. At the end, the Guardians got back into their ship when Adam Warlock starts acting weird and Magus starts taking over, so we go into his head and do one last boss fight. After that, Adam Warlock thanks the team and now Quill is concerned with how he (and the rest of the Guardians) will raise Nikki and accommodate her into the team.
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I'm a little teapot blowing off steam. https://m.imgur.com/pmc9XsI https://m.imgur.com/4ihl8bE