New MacBook Pro coming September?

A new MacBook Pro may be released soon, around September following Apple's release cycle. The new iPhone 5S may be released then as well, but we'll really have to wait and see. 
As for the chips themselves, the International Business Times reported that Apple has asked Intel to provide an “ultra-high performance” version of the Haswell CPU for use in the new MacBook Pro. Apple requested that the special Haswell chips be fitted with Intel’s top-of-the-line GT3e (Iris Pro 5200) integrated graphics.
The Diplomat

As far as past release cycles, the Macbook Pro should have two options, Retina and non-retina. As almost every Apple all-in-one device sports a retina display, Apple may eliminate the barrior between Retina and non-retina with this release.