Sales of the 70D are slower than expected,
Yes.... if you look at the Amazon Sales ratings....
The 70D with a lens is only number 4 DSLR in sales
The 70D bare body is only #7
The T31 in various packages are #1 and #2 and #19
The 60D in various packages are #9, #10 and #39
The T5i is #18, #22, #23,
The 7D is #38
Obviously APSC is DEAD! and FF will win the sales competition...
< HUGE SARCASM TAG>
The 6D is #11 an #16
The 5D3 is #14 and #21
The 1DX does not show up in the top 100....
It makes perfect sense that Canon will drop a top selling camera to protect one that does not it into the top 100... NOT!!!
So lets look at "digital camera" sales:
So looking at that, where do you invest in digital camera R&D?
I'm amazed that the T3i is still at the top of the list.... while the 5D3 shows up at #73....
So to answer your question, I'd invest in whatever can turn a profit....
You can't use all digital cameras for that kind of analysis ---the top seller there is a $68 P&S --- LOL --- at #12 there is a gopro suctioncup mount... $38 --- LOL --- and the 5d3 ranks at 373...well given what else is in this list, it's actually not bad at all --- do you really think a $3000 camera body would outsell anything else on that list?
?? There is nothing there in the top 20 over $500 - the 70d pops in there at #36...that's the only thing above $500 within the top 40. The 70D pops up again, this time body only at #45 --- and still...that leaves only 2 items over the $500 mark in the top 60...
invest in what turns a profit? How many $68 P&S cameras must you sell to equal the profit from 1 5d3 sale? Not to mention that there are all those other reports on market trends - that being P&S on the decline, cell phone camera's on the rise...
So this list is like the worst list to use to base any decisions on.
Said it before and will say it again --- what is the targeted market niche for the 7d2? Is that market segment enough to warrant putting the thing into production? who is this market segment? what other options are there for this target audience? I'm not saying I have that answer. But, however this question is answered is going to be a lead factor in any decision to release a 7d2 or not too.