A large amount of snow
An amazing dinner, turkey and the whole works
A spectacular Christmas tree- most importantly without tinsel
Everyone will love the presents he gets for them.

However, things don't always work out quite as we always want them to. Meanwhile, as the special progresses, a number of other storylines are revealed, perhaps so many that the show's younger target audience might find it difficult to follow:

D.W. wants a new toy, "Tina the Talking Tammy," for Christmas and Jane Read is unable to find it at stores anywhere.
Uncle Fred is going on a trip to Florida, but his car just so happens to break down on the way there. So for the meantime, he and his dog, Roarie, are staying at the Reads' for Christmas.
The timing of Francine's family's celebration of Hannunkah conflicts with that of Muffy's "holiday extravaganza," causing Francine to miss the party. When Muffy states that Hannunkah isn't as important as Christmas, Francine stops speaking to her.
Ever since Buster's mother and father got divorced, Christmas has been a difficult time for Buster and his Mom. Buster's Mom wakes up him up early on the days before Christmas and makes him pancakes, thinking that it's Christmas, then Buster has to explain to her that it's not Christmas yet. Arthur and his friends suggest he create his own holiday- Baxter Day. Buster is sceptical, but he agrees to give it a try.
Every Christmas, Binky volunteers at a homeless shelter with his Dad, and this year, he's trying to bake something special to bring. However, he's been taking cooking lessons from the "Thora Institution" (For example: He makes a pecan pie without shelling the pecans first...)
Brain's family is celebrating Kwanzaa.
George's family is revealed to Swedish and they celebrate Sankta Lucia Day.

In the end, things don't work out quite as everybody may have hoped they would, but it seems to be for the better. Well, maybe, assuming Arthur can ever get D.W. to stop her new toy, Quackers, from singing "Quick, quack, quaddy-quack..."