このΞガンダムが登場する「機動戦士ガンダム 閃光のハサウェイ」は、時代的にはガンダムＵＣの約9年後となる宇宙世紀105年が舞台。ep7では、これくらい先の時代への布石となるようなものも登場する予定です。 (広報いぬ) #g_uc
and here's a rough translation by desmondchieng
"Mobile Suit Gundam: Hathaway's Flash" is the series in which Xi Gundam appears. The series took place in U.C.0105, about 9 years after Gundam Unicorn. In Episode 7, some elements from that era is scheduled to make an appearance"
we are hoping for an Anime adaptation of Hathaway's flash!
the event takes place 9 years after the events in Gundam UC
- stay tuned for more info
---- info about Hathaway's Flash via wiki pedia
Mobile Suit Gundam: Hathaway's Flash was a series of three Gundam novels written by Gundam-creator Yoshiyuki Tomino from February 1989 to May 1990. They chronicle the later life of Hathaway Noa, the son of Bright Noa, twelve years after the events of the second Neo Zeon movement as seen in Mobile Suit Gundam: Char's Counterattack. The novel featured four new mobile suit designs by Moriki Yasuhiro, the mechanical designer of Hades Project Zeorymer.
In Hathaway's Flash, Hathaway Noa is still haunted by his past actions (not to mention the spirit of deceased Newtype Quess Paraya), joins a terrorist organization called Mafty and adopts the false name "Mafty Navue Erin". The organization Mafty is fighting a terrorist campaign against the Earth Federation government, and they are eventually able to acquire the incredibly powerful prototype Ξ Gundam, which Hathaway becomes the pilot of. Using the Ξ Gundam Mafty attempts to attack a meeting of high-ranking Federation cabinet members in Adelaide, Australia to force them to vote down a provision which would strengthen the Federations already considerable powers.
As a point to note, this novel focuses on a version of events chronicled in creator Yoshiyuki
Tomino's novelized form of Char's Counterattack, rather than his animated movie version.