Nintendo's shares have soared ahead of the official reveal of its long-rumored console-handheld hybrid, the NX. 

As reported by Bloomberg, shares surged by as much as 4.6 percent in Tokyo today, adding over $1 billion to Nintendo's market value. 

"The reveal comes relatively late for a game console that is slated to go on sale in March," said Ace Research Institute analyst Hideki Yasuda, speaking to Bloomberg.

"It has to be sufficiently different from Wii U and deliver on Nintendo’s promise of a completely new concept device."

Nintendo confirmed the existence of the NX back in March 2015, with Satoru Iwata, who was company President at the time, describing the machine as a "brand-new concept."

The console-maker has remained tight-lipped since then, only …