So you'd basically be pitching a Surly Ogre (29x2.5 or 27.5x3.0) competitor? Surly call it an "All Season Commuter" but it's a capable off and on road touring and commuting bike. There are quite a lot of bikes that are similar (
https://www.cyclingabout.com/list-of...packing-bikes/), so I don't really see the need to redefine the 'Adventure Touring and Bikepacking" category. Plus, why pitch to bike companies if you don't already work for one? The companies that would be comfortable making a 29x2.5 capable bike (brand image) probably already make one or have plans to.