SoftBank and Abu Dhabi's Mubadala Investment have formed a $400m venture fund, as the former lays out plans for more massive vehicles.

Telecommunications and internet group SoftBank is partnering Abu Dhabi’s sovereign wealth fund, Mubadala Investment Company, to form a $400m investment fund called Mubadala Ventures Fund I, they announced on Wednesday.

The plans were announced shortly before SoftBank CEO Masayoshi Son told Nikkei Asian Review that the firm intends to raise successors to the Vision Fund, which reached a $93bn first close earlier this year, having attracted $15bn from Mubadala.

“The Vision Fund was just the first step, ¥10 trillion ($88bn)…