I very much doubt it. But I do wonder if they'd try bury the news immediately after or before the direct with a very low tweet or blog post by PlayStation.
e.g., Xbox has a very good direct where they showcase "exclusive" first-party games that are only releasing on Xbox: Hellblade 2, Avowed, Indiana Jones. And an hour later PlayStation is allowed to tweet about Hi-Fi Rush and/or Sea of Thieves releasing on the PS5 in the next few months.
That way, one counter argument by the shill "journalists" could be: "who cares if a game is releasing full price years later on PS5 when it's available on GP? And see, Xbox isn't going third-party. They just showed us 3-4 games releasing exclusively on Xbox this year."
One of Xbox few thing that even fans and influencers dare to critic is them being confusing in their messaging. This would be
stupid tone deaf to the extreme, and needs Sony approval, and while that would be fun to imagine, but not realistic. It would imply them going all in, if more than one game get to be on PS5, or get announced at the same time. Games need some marketing and ports need it too. And each game will need something adapted to it. GAAS can do ports with a new update. single player love GOTY editions, or just a small ad campaign looking at a favorable time to slot the game when there is no competition. Better to do it one at a time.
You spend way too much time thinking about these things
Not to defend him but in this case we are seeing something that don't happen often. Xbox going to put their games day one PC was an event. Sony porting some of their games on PC was also significant. Same for Nintendo putting games on mobile. Changes like those are rare. If Xbox decide to put games on concurrent platforms, talking of how and when they will be doing it does interest me. If one day Gamepass got to be on Playstation, I think that you also would be curious of all the details. Would they announce it with a blog post, a state of play, a not E3 conference?
For me the marketing aspect of putting games on a concurrent machine make me curious because Xbox marketing is US centric. Will they put games on Switch with full ads in Japan, or just a youtube video? Will they try to really market games that could have more success in Europe this time, or continue to do the minimum?