Seven's 'last' tale - how would you like it to play out?

Do you mean like what he gets up to right before collecting the Master's remains and winding up in San Francisco? There's a nice idea in the audio Persuasion where the Seventh Doctor, at the end of his life, decides to deal with the nasties out in the universe before he regenerates in case his next incarnation isn't able to do the same. So he might be cleaning up his messes and tying off loose ends so that they don't end up tangling the Eighth Doctor.

Some audios set during this period have him in a quieter, more reflective mood. He's wandering more often, not always planning his destination as much. One thing is for sure, he's lost enough of his touch to forget to check the scanner before leaving the TARDIS!

I'd like it to be him finally putting the grim "Time's Champion" to bed, ready for the eighth Doctor to be free of his past.

Yes I had the exact same thought at the start of Doom Coalition!

I too hope that we get both of these two stories and a whole host of adventures that could make up a final series for the Seventh Doctor. Now that is what I would like to see in the main range - seven releases back-to-back (September through to March the following year) with the Doctor knowingly heading towards his final fate. With Death Collectors, Romana, CIAce, the Master and the Eleven all in the mix and perhaps even Death herself.

On the old forum I pointed to the movie Final Destination as inspiration- with the Doctor trying to cheat Death for both himself and the Master.

For my part, I don't see the burning need for a "Seventh Doctor-The Final Adventure." Unlike Collin Baker, McCoy got a proper sendoff. It feels a bit like saying "Well, wasn't Hartnell's departure just grafted on? Let's make a story set in the middle of the 10th Planet, where the 1st Doctor is taken out of time by the Celestial Toymaker, culminating in our hero sacrificing his vitality for the greater good!" If you want to, cool, but it's not filling some glaring gap.

That said, were this to be done, I'd want Big Finish to explore the tail-end of Seventh's life a bit more beforehand. They've done several stories from that period, but there was a conscious effort to keep listeners in the dark about background to it.

Well, if you've still got the copy, I'll happily take it off your hands. 

Quite honestly, I would like to see BF give The Seventh Doctor a true motive for being the more mysterious, manipulative version of The Doctor. There have been hints and subtleties, but I've never really encountered a solid explanation to his motive for being a proactive versus an oftentimes reactive Doctor. If BF were to do a final lead-in story to the TV Movie, I would love for them to provide that explanation, possibly as The Seventh Doctor reflects back on all he's done during his time.

The TV show already did that to some degree, with the Doctor revealing that he recognized Fenric's meddling as far back as Iceworld.

I believe that the New Adventures, in addition to picking up that bit, introduced the idea that the Seventh Doctor was born to be the Champion of the Eternal (and member of the Gallifreyan pantheon) Time.

For a more philosophical, psychological explanation/defense, see Big Finish's own Death in the Family.