As I can read Polish, here is what the Warseer/whoever guys seem to be missing (very briefly).
The event was for GW retailers in Poland - so it was an overall discussion of marketing strategy, etc. etc.
First, if you go to Citadela's original (Polish) post, you'll see certain items marked SPLASH. That means - delayed release. Just like you first release the Bret battalion before the individual boxed sets (thus the picture of Brets at the top - it has NOTHING to do with new releases and is used purely as an example). So - Harlequins box - normal release. Harlequins blister - SPLASH - 3-month delay. For Empire, the standard bearer is marked SPLASH.
Second, GW has articulated that its pricing should rise by an average of 4%/year or 20%/5 years. This will be universal, presumably applied in logical increments (e.g. a $35 box going to $40), and the only exceptions to the gradual price increases will be things where prices have already been driven up. [I like to think of it in terms of "rolling averages" - i.e. if a 5-year rolling average is already at 20%-25%, no price increase. Otherwise, price increase.]
I'm not going to give a lecture on why this is the wrong business decision (from a purely business standpoint - nothing to do with GW, this is how any similar business model works - or doesn't). Partly because I had just given one elsewhere. Suffice it to say, GW can't drive volume, and doesn't have too many costs to cut (given its expansion strategy), and so selects to drive price. This, in turn, subsumes that its content demands a premium irrespective of any competitor offerings (from Battlefront & Privateer to video games), and that demand is fairly inelastic (i.e. there is room to raise prices without losing so much volume that there is zero or negative impact on overall sales). Judge for yourselves if this is the case; suffice it to say, GW's financial statements so far paint a decidedly one-way picture. In the meanwhile, prices will continue to rise (so better to buy now - preferably at discount retailers or on Ebay - than wait).
Third, the Nemesis Crown campaign will be in the summer and will focus on Orcs, Empire and Dwarfs. The post says it will be an improved version of the Medusa campaign - since I don't remember what that means...I don't remember what that means. The campaign is when many of the releases will be made - plastic Flaggies, Hellguns (Helblaster/Helstorm sprue), etc.
On the foot wizard - the post says that GW has decided to replace the current foot/mounted wizard offering (i.e. no more mounted wizards - they can't picture an instance where it's useful, and, apparently, producing a stand-alone plastic model has run into some issues due to its size - bigger kits like the Giant are easier, or more economical, or whatever; so only the foot wizard will be made).
Nemesis is when they release new terrain - the plastic trees look particularly good. Also, for all you painters out there - GW will release three pigmented primers (shown in the photo), because they found that high-pigmented paints are hard to "get" on white/black foundations. GW's tests CLAIM that these new formulas are about as good as Vallejo.
I think that about does it. If you scroll down a few posts, you'll see the contents of Orc/Dwarf mega-forces - assume Empire will look something similar. Shout if you have any further questions.