For more information, here are two posts by David Bratman, from which I learned about these projects:
And here is a link to the ROLLING STONE article David references . . .
. . . and a related piece in which they propose five actors they'd like to see play JRRT: Cumberbatch (who'd be much better as Lewis, surely), Tennant (sounds a bad idea to me), Jeremy Renner (the only one of the five I'd never heard of), Radcliffe (having seen one of his post-Potter films, I hope not), and McKellan (who's good in everything). Janice pointed out they forgot Freeman.
and also appendige, 'Five Actors Who Could Play Tolkien' [JC: they forgot Martin Freeman!]
Finally, here's more on the Xian Lewis/Tolkien movie, which from what little we know of both films at this point (which isn't much) to be the more inaccurate of the two, in that it seems to be less interested in Lewis and Tolkien than in the story it wants to use them to tell.**
It'll be interesting to follow these two projects over the next few months and see if they survive the ruthless process of getting a modern film made and, if so, what the final products will look like.
More as thing develop.
*cf my posts of January 2013 ( http://sacnoths.blogspot.com/2013/01/the-next-tolkien-film.html ) and December 2013 ( http://sacnoths.blogspot.com/2013/12/tolkien-biopic.html ).
**There's also more about both movies at Tor.Com: