The phrase "to accompany the announcement" means that something will be done or presented at the same time as an official statement is made. Full definition
A new trailer with gameplay accompanied this announcement and can be seen below. (ps3attitude.com)
According to the FAQ accompanying the announcement, it does not. (kotaku.com)
This innovatively designed publication, which accompanies the announcement of the short list for the Hugo Boss Prize 2008, features special artist - designed pages by each of the finalists — Christoph Büchel, Patty Chang, Sam Durant, Emily Jacir, Joachim Koester and Roman Signer — as well as accompanying essays. (artbook.com)