Nothing happened to it, it never was confirmed and the devs seemingly ignored all the requests. People requesting it doesnt mean it will happen. I highly doubt it's ever going to happen too.
The Lizard DLC was probably the last DLC coming out and to be fair that's a good thing. No need for them to waste time on releasing this challenge DLCs that get boring after 1 minute because they have no real purpose. They should've focused on story DLC (a movie story DLC, I would pay up to 20€ for that) and a Peter Parker freeroam mode.
I'm not angry at them anymore for giving no support or proper DLC, I'm pretty much done with this game and I doubt any future DLC is going to change that. Lets hope they learned their lesson and listen to the community ideas for the sequel.