I saw the announcement for the new Luc Besson movie cast and was really starting to wonder if there had been charges against him at some point.

If he did not Trademark Inktober, anyone else could have. Such as a Hobby Lobby, or a Michaels. A corporation could have taken it. It is not first to be published like a copyright is.

I feel it's still important to understand the rules.
Logos are still Trademarks.
You may notice a TM or R next to a logo for Trademark or Registered Trademark.
Yes, you can't use it as a Title or Cover of an item you are going to SELL.
Still doesn't give him ownership of anything.

Max Landis is a dead on comparison. I was going to go with Miles Bron.

I'd personally say there are a lot of substantive stylistic changes from one to the other.