[[WMG: The rabbit at the end who takes Hazel into his Owsla is not El-ahrairah, but is the Black Rabbit of Inle instead.]]
TheOtherWiki's synopsis states that the rabbit who appears before Hazel at the end is El-ahrairah, but I'd like to suggest that it is the Black Rabbit instead.
First, if you watch the film, you see what we ''know'' is the Black Rabbit when he guides Fiver to find Hazel [[spoiler:after he gets shot]]. At the end of the film, we see a black ghost of a rabbit, but this one has more defined features. However, if you watch closely, not only does this rabbit's eyes glow red (just like the Black Rabbit's did), but also while it is bounding away from the warren, it looks just like the rabbit that led Fiver down the hill earlier in the film.
Second, if you think about it, the rabbit being El-ahrairah doesn't make sense -- El-ahrairah is a folk hero. Most rabbits believe he exists, but in both the book and the film, we're never shown beyond a doubt that he does indeed exist, truly. However, in the book, Fiver has a dream where he directly meets the Black Rabbit, and the film has that awesome "Bright Eyes" scene where he chases said Black Rabbit.
Third, If that really was El-ahrairah, then that means El-ahrairah is actually dead (shouldn't he be in the Black Rabbit's Owsla now, then? The book teaches us that the Black Rabbit is even more clever/powerful/etc than he is).
Fourth, the book teaches us that the Black Rabbit does indeed have an Owsla; as seen in ''El-ahrairah and the Black Rabbit of Inle'' story told two-thirds of the way through the book. Where ''else'' would the Black Rabbit have gotten his Owsla, except from truly exceptional rabbits that lived and passed on? Hazel definitely fits ''that'' category.
* In the Film's credits at the end (watched it just now), it says Joss Ackland did the voice of "The Black Rabbit". Seeing that the Black Rabbit of Inle has no spoken lines anywhere else in the film (the only other scene featuring him is the Bright Eyes scene), this is the only scene that they could possibly be referring to.
** Unless a scene featuring him was filmed and then cut.
* Either that, or ''El-ahrairah and the Black Rabbit are one and the same.'' Which was my initial interpretation of that scene...
* It's definitely El-ahrairah, I'm afraid... In the book, Hazel initially does not recognise him, but then identifies him by the starlight in his ears, which was a gift from Frith when he replaced El-ahrairah's missing ears at the end of the tale of El-ahrairah and the Black Rabbit. The Black Rabbit does not have illuminated ears. The film does confuse things a bit, but it's still supposed to be El-ahrairah - a caption in the relevant part of the picture book of the film identifies him by name.
[[WMG: Bigwig was invited to join El-ahrairah's Owsla too.]]
Sure, Hazel got them out of Sandleford and to Watership, but after everything Bigwig did, you can't say that he didn't deserve a spot in the Owsla.
* I'd like to think they weren't the only ones. Blackberry for his intelligence, Dandelion for his storytelling, and Pipkin for bravery far above and beyond his weight class. Fiver probably got an invite, too, but choose to explore elsewhere.
[[WMG: The story of Cowslip's warren is a religious allegory.]]
The part about Cowslip's warren is an allegory for the readers, showing that civilization, art, and lesiure are parts of a trap set by Satan to ensnare the souls of humanity, and hard work and fellowship in a natural life are part of the path to salvation.