I'll be rather shocked if the BG&E2 rumour ends up being accurate. It hasn't been corroborated, it's a software rumour and Dale backed the wrong horse vis-a-vis the Uncharted 4 DLC, and, most of all, the details have changed twice now (in production/2017 release/Switch exclusive -> in pre-production/2018 release/teaser during Switch reveal/Switch exclusive -> maybe a teaser during the Switch media event/timed Switch exclusive).
Not sure about this one, either, but Ubisoft leaks like a strainer. I wouldn't be surprised if it turned out to be true.