Here's my idea, (set just after Lugaru) be gentle
story
Turner, after slaying the alpha-wolf becomes sick to his stomach at the idea of war, and fighting. It made him want to leave the rabbits and wolves behind. He sets off over seas into a new land and resides on the coast. He is happy and lives there for roughly 3 years.
Then all hell breaks loose; Turner (a tad older, not quite as fit after 3 years of not fighting) is woken by laughter. There are three wolves standing at the end of his bunk. two brown and one white. The Alpha-wolf has returned (he has a huge scar across his chest and one on his face). Turner can't believe what he's seeing and get's captured quickly by the two brown wolves.
Turner gets taken across the sea for weeks until they finally hit their destination: (must... think... of... NAME!!). Turner was beaten and weak from the constant torture from the alpha-wolf (payback oh noes), and being constantly thrown in the brig of the ship they sailed in didn't help either
At "No-name" the wolves have set up quite a large base, thriving with wolves. Rabbit meat is being sold everywhere. Turner is sickened by the sight of possible old friends being strung up by their paws and turned inside-out for sale to their worst enemy.
Turner is then subjected to torture day and night as payback for what he did to the alpha-wolf and the rest of the wolves. He hangs in just barely, each day...
Days later, a small group of rabbits have gone out hunting, it so happens that they've lost their map and they turn up about 100 metres from the wolf base. the oldest of the group (looks like turner with grey beard and lighter fur) can see into the castle window from the hill they're on. He sees turner being whipped and anger rises inside him. He then takes his small group into the base to get turner back.
They fail miserably with two of the five of them end up dying. They scramble back to the hill and set up and camp, waiting to try again and again until they free turner and get revenge on the wolves.
gameplay
The gameplay would have team based real time combat (say 3 rabbits vs 2 wolves, although th wolves may be stronger) you could give orders to your team (simple ones) and day would come to night realistically.
At night you would re group with your team and get out of the city (or stay in if you find a good hiding spot) and back to your camp. At night you can either hunt for food, or sleep. Both regain health, but both have their drawbacks:
hunting
pros:
-gains health the fastest
-can take food back to camp for later (or smaller portions to be kept in backpack for attack runs)
-explore the environment (possibly finding better camp sites or other ways into the wolf base or even weapons)
cons:
-leaves the camp unattended (which can be destroyed by wolves, then you'd have to build a new one which takes a whole day)
-wolves might also be out for the hunt and they'd follow you back to camp.
sleeping
pros:
-can change sleep cycles with other rabbits (have two of them sleep while one watches for wolves, or other cycles)
-makes rabbits more physically fit (faster and hit harder for the following day)
cons:
-you are weaker as soon as you wake up, so if a wolf attacks your patrol rabbit and comes for the sleeping ones you have no chance.
-you don't get to explore and find new things
Well, that's pretty much it.
Hope you liked it.