UPDATE 1/5/18: Developer Supergonk has announced that its paint-smearing, co-op-focussed arcade racer Trailblazers will launch on PC, PlayStation 4, and Xbox One next week, with a Switch version now slated for June.
The latter bit of news is something of a surprise, given that Supergonk and publisher Rising Star had previously stated that Trailblazers would be coming to "all major gaming platforms" this month - but at least the Switch edition isn't lagging too far behind.
If it's firm dates you're after, Trailblazers will release on PlayStation 4 and PC next Tuesday, May 8th, while the Xbox One version arrives a day later on May 9th. As previously confirmed, cross-platform multiplayer is supported between PC and PS4, and PC and Xbox One. Once the Switch version launches, it'll be compatible online with PC and Xbox One.