I don’t see myself being a lead in this but I definitely could help out (creating a test/tests).
Does vnext already include a e2e testing framework? If not I would suggest looking at testcafe, in contrary to most other tooling out there it does not rely on selenium. It’s node based and supports multiple browsers (I have to say I like Cypress better due to debugging info but it’s limited to chrome only so not an option for vnext I guess).
If you would like to enable people to easily pitch in writing scenario’s only it could be a good idea to have a look at a cucumber implementation to enable writing features in gherkin format.