I don't know what it is that you've read, but I find that highly unlikely. First, going a year without any sort of release is atypical. There's almost always some sort of speed bump, even if it's a lame one (the lamest perhaps ever was the one this past February). Second, the "2nd half 2014" number already reflects the slip on Intel's side; Broadwell was original supposed to come earlier in 2014 but was pushed back. Third, the commonly accepted reason that we had to wait this long for these Haswell rMBPs was to get sufficient supply of the Crystalwell chips, as they came out later and were in shorter supply.
I'd bet a whole lot of money we won't be waiting a year to see a refresh on existing architecture. That's insane. It isn't like Apple just sits on new stuff for kicks.
I just read that there will be a "Haswell refresh" first before broadwell comes around.
Not sure how true that is, but just an FYI.