There's no roadmap - it's true open source project - anyone can jump in/out at will.
The next step the node that will allow for computing tasks - currently under development by EK and coralreefer.

Check progress here
https://github.com/OrdinaryDude/ElasticPrototypeWallet/commits/master

and here
https://github.com/sprocket-fpga/xel_miner/commits/master

or use slack channel https://elasticfans.herokuapp.com/ if you want to contact the devs