Pretty much. Jaime's hatred and distrust of Cersei is even more prominent in the books, specifically becaRuse he is reminded of the Mad King. I usually don't buy into all those "Secret Targaryen" theories, but Cersei's behavior alone is why I suspect that she and Jaime are actually Aerys' bastards. There were in-universe rumors that Aerys slept with their mother before Tywin. Jaime and Cersei perfectly represent the "two heads" of the Targaryen coin thing. Jaime is proud but fairly sensible when removed from her influences. She's a paranoid nutjob who likes burning things and has only ever been legitimately attracted to other (potential) Targaryens.
Predictions about the Endgame Seasons:
Hopefully they won't make Dany go for the Iron Islands first. She should base herself in Dragonstone and then land her army in the Stormlands while she still has the advantage of surprise. But there's also two more seasons and the writers fuck around, so they might have her focus solely on Euron in Season 7. Which would be disappointing.
* Sansa will agree to marry Littlefinger, then immediately kill him to seize control of the Vale. Moon door?
* Cersei will almost immediately push troops up to retake the North.
* That'll create big battles in the Riverlands..... again.
* Jon and Sansa will put Edmure back in charge. North / Vale / Riverlands triple alliance.
* They then plan on accomplishing Robb's old goal of sacking Casterly Rock to cut off Cersei's reinforcements.
* For the sake of diplomacy, Dany may send Tyrion to help them. Mutual goals, after all.
* Arya reunites with her direwolf.
* I SWEAR TO GOD, IF THEY JUST WRITE NYMERIA OUT, I'LL BE PISSED.
* She might kill Melisandre, as she was technically on her list.
* Same with Beric and Thoros.
* Awkward encounter with the Hound as a result, but probably won't end in violence.
* I think it's inevitable that she ends up joining Jon and Sansa in the Riverlands.
* Cersei's court unravels day by day.
* Paranoid of plots within, but she's also distracted by a two-front war with Jon/Sansa in the north and Dany in the south.
* She sends troops to the Riverlands and starts to lose.
* She sends troops to Dorne, meets heavy resistance, then Reach knights close in from the rear and mow everyone down.
* Dany pushes north to King's Landing.
* Peasants start revolting.
* She threatens to burn them all with wildfire.
* Jaime has to kill her.
* Pretty sure he'll commit suicide or she'll shank him in the process.
* Dany reaches King's Landing, only to find it a burned out ruin (her vision in the house of undying)
* Bran's "mark" allows the White Walkers to break the Wall and invade Westeros.
* Total battle between humanity and the White Walkers.
* Sam's role will probably be finding out what their weaknesses are.
* Still have a feeling Dany will die and Jon will end up taking over for her.
* Especially since she's sterile; couldn't continue the line if she wanted.
* Tyrion becomes Lord of the Westerlands.
* Brienne becomes the first lady commander of the Kingsguard / Queensguard.
* Gendry finds his way to Westeros.