It has been revealed that the update to Yu-Gi-Oh! Legacy of the Duelist: Link Evolution announced last December will come out this Spring, adding:

• “a lot of new cards”, including “Crystron Halqifibrax” which was teased as one of its promotional cards.
• the Master Rule Revision that will take effects in both territories on April 1st
• 15 new characters from Yu-Gi-Oh! VRAINS, including the 4 in the initial announcement (Blue Maiden, Soulburner, Season 2 Revolver/Varis, and Ai’s SOLtiS form)

Source: Siliconera