The Public Theater’s well-reviewed Shakespeare in the Park production of “The Merchant of Venice,” toplined by Al Pacino, will have a limited-run Broadway transfer that kicks off in October.Commercial producers Jeffrey Richards and Jerry Frankel — who also teamed with the Public on Main Stem moves for “Hair” and the upcoming “Bloody Bloody Andrew Jackson” — join the Gotham nonprofit for the Rialto run. Show will play a seven-perf week (rather than the usual eight), with Pacino set to appear in 78 of those perfs. Sked for his handful of absences remains to be announced. Casting for the transfer, aside from Pacino, also is not yet confirmed. Daniel Sullivan reprises his helming duties on the production, which will run Oct. 19-Jan. 9.