Jan-Michael Vincent definitely did fail to bring his addiction under control.
I have not heard anything about him being connected with the remake of
The Mechanic (1972) in which he starred alongside Charles Bronson. The new film will be directed by Simon West who also directed
Con Air (1997),
The General's Daughter (1999) and
Lara Croft: Tomb Raider (2001). The remake will star Jason Statham and Donald Sutherland. A trailer can be found here:
http://www.movies.spoilertv.com/2010/03/mechanic-official-trailer-starring.html
I also enjoyed seeing Jan-Michael Vincent in
Airwolf, one of my favourite TV shows from the 1980s. My personal favourite of his films is
The Undefeated (1969) starring John Wayne and Rock Hudson. However it was also amusing to see him, when he had fallen from grace in the 1990s, in the erotic thrillers
Indecent Behaviour (1993) starring Shannon Tweed,
Sins of Desire (also 1993) starring Delia Sheppard, and
Animal Instincts (1992) again starring Sheppard, along with David Carradine, John Saxon and Shannon Whirry who starred with Seagal in
Out for Justice (1991). How would you rate his performances in these films Donald Lee Wilkey?
I agree it would be nice if Seagal and Vincent were able to star together in an action film or perhaps an erotic thriller, a genre Seagal has not yet ventured into.