Question/discussion about season 2 of the anime

So forgive me if this has been posted before. I tried looking it up but couldn’t find any discussions related to my question.

The anime is set to return this year with 13 episodes. But my question is, is that all it’s going to be? The math I did the Spade Arc is about 61 chapters (270-331) from where the anime left off. So if they did that it would be about 4.5 chapters per episode. Which seems like a lot, right? I figured we’d get some extended fight scenes especially with the amount of devils that pour into the battle. That’s assuming the typical 22 minute runtime with open/closing credits included.

Maybe a full 25ish episodes would be way too much stretching for this arc but we can’t only be getting 13 episodes in total, right?

I know no one will have a definitive answer to this but I was curious to hear what other people thought about the idea of the entire Spade Arc being just 13 episodes. Thanks!