Will the next big unionization movement come in the wharehousing industry?

After 30 years of decling wages job losses and a shrinking middle class their are signs that a major reunioniation of the american workforce is in the near future however with manufacturing leaving the country at an alarming rate the reunre unionizationl have to take place in another industry. I see wharehousing as the perfect industry with many parallels to manufacturing. It is an industry filled with semi skilled laborors such as forklift operators and sorters who are grossly underpaid even though they posses some skills. Do you see a major movement about to happen in the warehousing industry that would turn crappy jobs into good middle class jobs?