I found a high-quality subbed version of the Operation Tempest trailer!
Three things worth noting.
1.) This aired at the end of a 15th anniversary special going over all the Pokémon movies and promoting the current one, airing on August 16, 2012. That means the first episode of the two-parter advertised in this trailer aired 6 weeks later. In other words, exactly the same thing that happened with "Team Rocket vs. Team Plasma!" - its trailer aired at the end of a special (the Dawn and Brock post-series DP special) and the first episode of the two-parter was to air 6 weeks later. So this is yet another thing Operation Tempest cribbed from that two-parter!
2.) Context for the way this trailer is marketed: the anime team were toying with the idea of not including Team Rocket in XY, and so they needed to know whether or not it was a good idea to retire them before October 2012 when writing for XY would begin. So they tested the idea of Team Rocket leaving, with the TRio saying they'd be the stars in "next year's movie" before suddenly getting cut off with the big "FAREWELL, TEAM ROCKET!?" font and the trailer claiming that Operation Tempest is their finale after 15 years, where they take their "final actions". Obviously, they were always going to show up again the following year, this was just to see how fans react. When fans reacted negatively, they got locked into XY, with Operation Tempest even airing with a poll as to which of their old Pokémon should come back with them (a poll that was clearly made already knowing that Wobbuffett would win it.)
3.) But even if the anime team was considering ditching Team Rocket, I genuinely don't believe this event would have been marketed this way had it not been for factors that altered the original idea for it, which was just to be Team Rocket's last major solo mission and the closure for Year 2 prior to a Team Plasma-centric Year 3 where Team Rocket would still be undertaking serious missions specifically against them. But the double-whammy of the 3/11/11 disaster and Black 2/White 2 instead of Gray ended up destroying that intended Team Plasma storyline and Team Rocket's intended part in it that "Team Rocket vs. Team Plasma!" was meant to set up. Suddenly, Operation Tempest became an even bigger deal that it was initially envisioned as, since Team Rocket's serious villain arc would now fully end with it.
