What do you think that is going to happen in Littlefoot ?????

Likely Littlefoot will team up with Cera, Ducky, Spike, and Petrie (voice of Jeff Bennett) and go on a Jurassic-era adventure of some sort.

Joke answer aside, if the episode is about Marlene's foot, perhaps her mother will visit or transfer to the zoo and instantly recognize her daughter because of the identifying marking. It would then be a fair guess that Marlene's parents' nickname for her as a pup was "Littlefoot." If the episode will have a plot beyond Marlene, my guesses would include the penguins being shown in their younger years, Private being shown in the future to have a family, and an Indian/Native Penguin playing a role of some sort.

Could be a Halloween episode idk not sure at all we just need the plot for it

Well, after a bit of thought, perhaps Littlefoot is a sort of title reference for Bigfoot; you know, that mythical, wild creature. And if it's a Marlene episode, maybe we will see Marlene going into her wild side again. Other than that, I really don't have much of a summary or idea for it, but that's just maybe what is involved in the plot.

If you look good on the picture, you can see on the left of Merlene sitting Kowalski
And they drive in the car of the penguins ...
Maybe they went to a mission (to help marlene with something ..or they again wanted marlene to help them with something) with Merlene and after they finished it, they returned with Merlene in the car. And Merlene was grateful (or had fun with them xD) and that's why their eyes look the way they look .. XD
Or maybe they went with Marlene in "small steps" to get her to not go feral out to the zoo :O
(sorry for my bad english XD just deal with it! ;3)

i didnt know from that episode!:O

I didn't know there WAS an episode coming up called Littlefoot. Exiting!
It could be a new character, maybe a mouse. It could be a reference to big foot. I don't know what big foot is, exactly, but I think it's something famous, like a yeti, or something.

I don't know... But although the picture from the episode says it won't be a big romance plot, I have a feeling it could be where Skipper tries to help cure Marlene of her "wild" side, and he succeeds. And then at the end Marlene is thankful and thinks different of him. Just a thought. X3

Hmm...Its a tough 1 because the name doesn't really say much about it? But i think what happens is: Some animal or human mistaken Marlene for a criminal or villain (with the nick-name littlefoot because mybe they walk quietly?)that had a similar and/or same mark as her. And the penguins help her out to prove that she is innocent...

Or its about the penguins and Marlene who go on a mission 2 find Littlefoot (perhaps Bigfoots son?) And Marlene tags along because of her curiosity and they travel in the penguins lil beach-buggy
(this might explain the car pic?!)

These r just guesses... But all i hope is that there are some Skilene moments! XD