You will not see iris pro in a Mac mini. the iris pro cpus a 47watt TDP. and the Mac Mini case maxes out to support 45w TDP
so most likely the new range will be lower end i5 models and no high end Mac Minis with 4 core cpus in the i7 haswell range.
In my opinion,
Intel® Core i7-4558U Processor 2.80 GHz (4M Cache, up to 3.30 GHz), Max. TDP # 28 W, Intel®
Iris graphics 5100,
Dual Core / 4 Threads.
or
Intel® Core i7-4550U Processor 1.50 GHz (4M Cache, up to 3.00 GHz), Max. TDP # 15 W, Intel®
HD Graphics 5000, Dual Core / 4 Threads.
or
Intel® Core i7-4650U Processor 1.70 GHz (4M Cache, up to 3.30 GHz), Max. TDP # 15 W, Intel®
HD Graphics 5000,
Dual Core / 4 Threads.
or
Intel® Core i7-4600M Processor 2.90 GHz (4M Cache, up to 3.60 GHz), Max. TDP # 37 W, Intel®
HD Graphics 4600,
Dual Core / 4 Threads.
or
Intel® Core i7-4702HQ Processor 2.20 GHz (6M Cache, up to 3.20 GHz), Max. TDP # 37 W, Intel®
HD Graphics 4600,
Quad Core / 8 Threads.
or
Intel® Core i7-4765T Processor 2.00 GHz (8M Cache, up to 3.00 GHz) Max. TDP # 35 W, Intel®
HD Graphics 4600,
Quad Core / 8 Threads.
These are all the candidate i7 Haswell mobile processors (Max. TDP below 45W). Unfortunately, there isn't any CPU (Dual or Quad Core) + Iris Pro 5200 graphics combination.
Let's see...
PS: How do you know that Mac Mini case Max. TDP # 45 W capability?