Family entertainment company ZAG is joining Chris Columbus’ 1492 Pictures and Ocean Blue Entertainment to finance and produce the live-action/hybrid Christmas pic 12/24. Matt Lieberman penned the script based on an original idea by David Guggenheim. 1492 and Ocean Blue pre-emptively purchased the spec by Lieberman (Mr Toad’s Wild Ride) in June 2013. The logline: When some old home video is discovered, two brothers set out to prove Santa Claus is real, setting an elaborate…