This is just the latest in a long line of redesigns. The original Vanguard site layout, pictured below, used Itou Akira's illustrations rather than Studio TMS or OLM's key art to represent the characters.
The first Trial Decks of the new era, V-TD01: Sendou Aichi and V-TD02: Kai Toshiki will launch in Japanese May 11th, 2018, and in English June 8th, 2018. They will be accompanied by a new sleeve based on the "Imaginary Gift" design. The first Booster Set of the Standard format, V-BT01: UNITE! TEAM Q4! will launch in Japan May 25th, 2018, and in English June 22nd, 2018. The first Extra Booster set, V-EB01: The Destructive Roar will launch in Japan June 29th, 2018, and in July for the English-speaking world.
The accompanying new anime series, codenamed "Origin," will begin airing May 5th, 2018, on TV Tokyo and affiliated stations. It will be simulcast with English subtitles on YouTube and Crunchyroll.