https://www.pcgamer.com/fatherhood-will-be-a-big-theme-in-spelunky-2-derek-yu-says/

Details on Spelunky 2 have been light since it was revealed last year, but creator Derek Yu talked about some of the themes of the dungeon-crawling sequel on a podcast last week. The game's first trailer strongly implies that the protagonist will be the daughter of Spelunky 1's main character, and while Yu didn't confirm that, he said that fatherhood is both a "big theme and [an] inspiration" for the follow-up.

"People know I’ve talked about my family life a little bit, being a dad, and how inspirational it’s been…and that’s been a big influence. Obviously my daughter has been just a big inspiration on me creatively, and it makes so much sense in that Spelunky 2 being a sequel to Spelunky 1, and then coming after I became a dad, which was in between Spelunky 1 and Spelunky 2…that would be a big theme and inspiration to me.”