I mean it would also just make sense for them to be in 40k. The great old ones are basically just slann starmasters anyways, so the seraphon being in 40k wouldnt be a stretch. Plus, they have the daemon keyword which means that in theory they should alreayd work for 40k.
The predator franchise does have good video games like predator hunting ground and predator concrete jungle.
I mean it would also just make sense for them to be in 40k. The great old ones are basically just slann starmasters anyways, so the seraphon being in 40k wouldnt be a stretch. Plus, they have the daemon keyword which means that in theory they should alreayd work for 40k.
It would be pretty cool to see a Lizardmen like faction set in a 40k setting.
In OnePageRules Grimdark Future they have Space Lizardmen