Someone posted a false announcement on the Wikipedia article for the series. That information has now been corrected. (See the other thread for reasons to be wary of any such announcements posted on Wikipedia, unless there is a link to the primary source.)
Please analyze any such rumors and announcements carefully. Unless a reliable source is cited and linked to, such announcements are likely to be false. The unavailability of William Fichtner and Eddie Cibrian means that Invasion has about a zero percent chance of being revived in the immediate future.
This is not to say that at some point, the main actors and producers couldn't get together and revive the show, but it's much more difficult to do so in a series that relies upon an ensemble cast. I know of at least two other network series that were partially revived years later (Hunter and The Pretender) but both of those shows had relatively few main characters. It was possible to revive those shows with only two or three of the main actors.
Maybe Invasion could be revived in a different format, with one group of survivors chasing Tom. Moving the story away from the town could allow the writers to explain the absence of many of the characters, but they would still need Fichtner and Cibrian. Otherwise, it would feel like a completely unrelated show or TV movie, like those direct-to-DVD sequels you see on discount shelves.
If anyone comes across one of these rumors, think it through. Does the announcement make any sense at all? If not, then chalk it up as an Internet troll taking advantage of the confusion caused by the writers' strike and feeding off the misdirection of television fans who don't have many new shows to watch these days.