The following is inspired by the leaked script from Colin Trevarrow's treatment for Star Wars Episode 9, which would have been called, "Duel of Fates".  In it, the first act involves our heros, Rey, Finn, Poe, Rose and BB-8 infiltrating Coruscant to disable a galactic jamming device, which explains why no one responded to Leia's call for help at the end of Episode 8. That got me thinking that it would have been interesting if this infiltration had been not to destroy the jammer, but to enter the ruins of the Jedi Temple to modify the Jedi emergency frequency beacon highlighted in Episode 3 to transmit one last transmission from Leia...a final plea for help in the Galaxy's most desperate hour. I can imagine what was meant to be a covert mission to be in and out with no one noticing to something going wrong and the Falcon and our friend being discovered and chased to the surface. On the surface, they blast their way through First Order defenses at the temple and just in the nick of time send the following transmission for the entire civilized Galacy to see:

For those of you who do not know me, I am General Leia Organa Solo. Years ago I served your parents in the fight to restore freedom to our Galaxy. Now I beg of you to help us now in our struggle against the First Order's vile obsession with returning us to those Dark Times. I regret that I am unable to present my request to you in person, but the Resistance has fallen under attack, and I’m afraid my mission to keep our Republic is at it's breaking point. I have embedded information vital to the survival of the Resitance into this transmission. You, my fellow Rebels and Resistors will know how to retrieve it. And for those of you who are new to our cause, never forget that you are not alone. Fear will only win if we stay divided. I have faith in you all. This is our most desperate hour. Help me, citizens of our Galaxy. You’re our only hope. The Force will be with us...always.