An Off Broadway production of Lanford Wilson’s “Talley’s Folly” is the final piece of the Roundabout Theater Company’s 2012-13 season to fall into place, landing a slot that begins perfs in February. Michael Wilson (“The Best Man”) directs.The 1979 play, which netted Wilson a Pulitzer, has been an on-and-off candidate for a major New York revival for the last decade or so. A 2002-03 Signature Theater incarnation, in which Cynthia Nixon was initially set to star, was scuttled by the actress’ pregnancy; a Broadway staging, to which Nixon was also attached, was skedded by Manhattan Theater Club for the 2005-06 season but was eventually scrapped in what was attributed to casting issues. Storyline of the two-hander, set in 1944, follows a Jewish man who returns to Lebanon, Missouri with the intention of asking a young Protestant nurse to marry him. No casting for the Roundabout production has yet been set. “Talley’s Folly” begins previews at the Roundabout’s Laura Pels Theater Feb. 8 ahead of a March 5 opening, joining a slate that also includes the Off Broadway bow of Jake Gyllenhaal in “If There Is I Haven’t Found It Yet” and Rialto revivals of “The Mystery of Edwin Drood” and “Cyrano de Bergerac,” among other titles.