I can guarantee that I will finish my ongoing series.
I currently don't have any concrete plans for a third one.
I feel that I may already overextended by deciding to start my second story so soon.
The main issue, in writing two kinds of similar, yet at the same time very different types of story is that, you have to immerse yourself, especially as a writer, in the actual fandom. And you can't do that with two stories simultaneously, not effectively at least.