Kevin Nash finished up as an active in-ring performer in WWE on last night's pay-per-view. Nash remains under a Legend's contract and can still be used, however, there are no plans for him to resume wrestling at this time. This is the reason for the stretcher angle that was done.
Below is a Tweet from Nash:
" data-datetime="2011-12-19T08:00:13+00:00">December 19, 2011
You can get my thoughts on Nash vs. Triple H at WWE TLC: Tables, Ladders & Chairs at this link.