This game isn't comparable to Lego Island/Movie/Dimensions/Worlds/Drive, the ones that rely only in the Lego IP (several of them made by Traveller Tales btw).
It's more comparable instead to Lego Star Wars/Indiana Jones/TLOR/Batman/Harry Potter/Pirates of the Caribbean/DC/Marvel/etc: the combination of Lego with a popular IP, which in this case would be a SIE one.
I assume they thought that could repeat the huge success that these Lego games of other popular IPs had but using SIE IPs instead. And they saw that these games sold particularly well on Nintendo devices, being one of the few rare exceptions where a 3rd party game sells very well there. So maybe they also considered Switch because of that. And maybe also release it on PC day one to experiment what happens with this type of game (we don't know if it's a GaaS or not, but doesn't seem to be the case).
Traveller Tales are very talented and succesful with the type of games they made, included many Lego games. But also are Guerrilla and this team they got for this game, who worked on stuff like Howgarts Legacy, Disney Infinity 3, For Honor and others, and before they made games like Split Second.
And in this case will be published and marketed by SIE, which is a top tier publisher more successful than the ones who published the other Lego games, including the TT ones (WB, Lucasarts, Eidos).