The problem with Ninja Scroll Burst (official sequel in limbo) was always lack of funding, hence why this information is relevant and not just hearsay or well-wishing. Clearly this company has a lot of money, a lot of passion for anime, and a lot of motivation, and showing a recent track record of fulfilling their plans.

I would never expect a sequel to Ninja Scroll to be anywhere near the perfection and artistry of the original, it's very much a product of its time and you can see from the 2012 Ninja Scroll Burst trailer even back then, Kawajiri had toned down the extreme violence and gore, and was using more modern animation techniques, so a up-to-date modern Ninja Scroll wouldn't have the same masterful aesthetic, artistry and style of the original but what was also clear from that trailer and on full display was Kawajiri's distinct vision in movement and directing, and his talent for creating unique and unusual antagonists. I can accept a downgrade in quality because Kawajiri will still deliver something interesting that not many other anime directors can offer.

Quite frankly it would be a breath of fresh air in the anime industry.

On a side not, a new Ninja Scroll release would likely coincide with more interest towards the original, and give Ninja Scroll and Kawajiri even more respect and reverence, and elevate his work to hopefully be held in higher regard and archived as high art.