Looks like the empty spot where Rumberos was is being filled by a similar (but hopefully not too similar) joint, local Latin American restaurant chain Alero. I was never a fan of Rumberos, and while Alero isn't my favorite, it's definitely a step up.
I saw the note on the 42 Bus blog, but they don't have a timeline yet. Nice to see an empty space being filled though. I hope they do well, but at the same time don't harm more local places like El Rinconcito II and Taqueria Distrito Federal.