You have a suitably Trek-y way to defeat/mollify/seal away the Iconians, but you need to reach them to use it, and all of T’Ket and L’Miren’s Heralds are in the way. On your side you have the largest fleet ever assembled by the Alliance or anyone in it. EVERYONE is here, ships from every member of the Delta Alliance and Iconian resistance–the three player factions of course, plus Cardassians, Ferengi, Krenim, even Borg Cooperative ships.
And you’re still outnumbered 10-to-1 and losing badly.
Then Sela warps in with a small group of Romulan ships, all that she could scrounge up of the Imperial fleet. “My friends and I came to help save our galaxy,” she says.
You thank her, with overtures of “but this isn’t enough to give us the edge.”
“And here come my friends now,” Sela says, as tens of thousands of Jem’Hadar warships warp in to help you.