You're right, I think... I'm not sure if Microsoft and Google would really really really have an inter-executive meeting and waste that much of their higher executives' time just to get a domain that isn't being used nor will neither use.
Plus, they'll realize it's fruitless because that only solves the problem ONCE. If they let it expire with both agreeing neither will use it.... another domainer could just reg it again.......... and again.......... and again...... you can't just stop a domain from being reg'd, right? It has to be reg'd.
So you're saying they'd spend even more resources to establish a third party trust JUST to be the registrant of the domain (we're talking like over $1k per year just for this shi*) that no one's going to use.
Yeeeeeeeeeeeeeeeeeeeeeeaaaaaaaaaaaaaaaaaaaaaah.
It would be a different story, though, if Mann used the domain and turned it into a site that's ranking.... HOlelleey shiz, there would be cowpies hitting turbines.