I doubt it. The only version of Batman Forever that's in HD is ripped from the blu ray. I don't have it in blu ray however I do own the Batman & Batman Returns blu ray disks (since they're all from the same collection). I know for a fact that the extras from the DVD version were transferred to the blu ray without being converted so they're in standard definition. So even if the scene is in the extras of the Batman Forever blu ray disk it would be in standard. The entire movie was converted into HD for blu ray. Unless they do a director's cut, there is no reason for WB to convert the deleted scenes.
I know there are some pretty good versions of the BF deleted scenes online. They're in standard as well but in very good quality, they were even used in the Red Book version of Batman Forever.