After building two robust smartphones - Nexus S and Galaxy Nexus for Google - Korean tech giant Samsung is allegedly working on a new Nexus offering.

According to a SamMobile report, the leaked specs suggest that the new Nexus, codenamed GT-I9260, is in the works and will sport minor changes compared to the original Galaxy Nexus. The next-gen Nexus is supposedly a hybrid of Google's Galaxy Nexus and Samsung's Galaxy S3.

"The next generation of the Nexus looks to be a small upgrade. When we see the specification we can say... Yes the screen, processor and camera is better, but for the HIGH-END market the processor isn't that great," asserted SamMobile.

The spec sheet lists details of processors, screens, cameras, storage, and SD cards for three smartphones: Galaxy Nexus (GT-I9250), Nexus (GT-I9260), and Galaxy S3 (GT-I9300). Samsung makes the first two smartphones for Google, whereas the third one is from its own-brand lineup.

The leaked spec sheet suggests that the new Nexus smartphone, like its predecessor Galaxy Nexus, will sport a 4.65-inch display on HD Super AMOLED screen like the S3's. The 1.5GHz dual-core A9 processor is an upgrade from the Galaxy Nexus's 1.2GHz dual-core A9. The next-gen Nexus's camera is expected to be bumped up from 5 megapixels to 8 megapixels and from 1.3 megapixels to 1.9 megapixels for the rear- and front-facing cameras, respectively. The new camera specifications are identical to Samsung's Galaxy S3.

Storage capacity remains the same at 16GB; however, the spec sheet indicates that the new Nexus will have an expandable storage option, courtesy of the SD card slot. This feature will be a novelty for the Google smartphone, as the Nexus S and Galaxy Nexus did not have this option.

Earlier in May, the Wall Street Journal had reported that Google was keen on expanding its Nexus program to as many as five devices, in a bid to increase its smartphone and tablet portfolio. The devices were expected to be available by Nov. 2012; Google's entry-level Nexus 7 tablet (manufactured by ASUS) was released in July this year and the next-gen Nexus could possibly be another device in Google's portfolio.

However, experts question the authenticity of the leaked specs sheet. No images of the purported next-gen Nexus smartphone are available anywhere, which is surprising (given the norm). Moreover, on further scrutiny, the information detailed on the leaked spec sheet is incorrect. The document calls the screen "Super AMOLED HD" instead of "HD Super AMOLED". Considering that the leaked document is allegedly an internal one, it is unlikely that any company would make such a faux pas with the name of its own-branded screen. Skeptics also opine that the in the past, Google has not offered a microSD card, so why would it suddenly take the expandable memory route.