Based on expected mid-cycle refreshes and new models for the MY '16, my vote goes to:
RX (obvious one and due after its current 6-year lifecycle)
GS (refresh due for its 4th year in, plus we've see the full-spindle + lighting changes as per the GS F)
ES (refresh due for its 4th year in, expecting a slightly more aggressive triple-L LED signature lighting and grille design echoing the GS, NX, RC)
IS (200t seems highly likely. Less likely but still plausible to see an iteration of the Tacoma's new 3.5L V6 put in the IS350)
The rest full redesigns for MY '17 + MY '18:
CT - MY'17, in line with the standard 6-year gen lifecycle and in line with its release one year after next Prius (which is however 6 months late, but still slated as a 'MY 16 for now)
LS - I believe it is still a year+ away from a full redesign, to be introduced as MY '17
LX - similar situation
GX - to MY'18, but depends on fate of and timing of the next 4Runner release.
TX - name is registered but will Lexus spin off this model from the '16 RX/current Highlander, simply drop it, or have an "RX L" long wheelbase...
LF-LC/SC - not before MY '17 or '18
LF-C2/RC C - not sure if Lexus was pulling our leg saying they won't make it but it makes no sense they built the RC's mid-section from the IS C to be applied as a future convertible...