I wrote a message to Oscar from U1 Technology because of LF Online and finally got an answer:

Hi Matthias,

Nice to hear from you again.
I just double check my mail box and find your email again.
Anyway, yes, the english version is developing right now, hopfully it can be launched on the internet during summer.
The content of first version will have 16 stages and 15 missions with around 20 characters available.

We will change www.littlefighteronline.com into english and different language will split into different pages.

[...]

Oscar

Actually I heard that some (german) fighters search for a new place where tournaments are organised.

So actually I ask if there's interest in an online fighting area, so LFE organise tournaments.

If you would take part or like the idea please post here...

I just saw this thread here in the forum and desided to ask Marti what's about with this new version - the results of the chat:

lfempire: hello marti
do you have a sec for one question?
I heard rumors that you and Starsky want to create a LF2 v2.0
is this right or wrong?
that's all...
Marti: let me see
we are actually working on a new version of LF2
but it is not v2.0
lfempire: which else?
Marti: actually, not a big change
just add background music
and add a "recording" feature
lfempire: so it's more a modification, but no new characters or so?
Marti: no new chars or moves
lfempire: ok

[...]

hm, this new game
what will it be like?
Marti: a fighting game
again
lfempire:
Marti: with RTS, supports online
like battle mode of LF2
lfempire: what is RTS?
the online fight ?
Marti: Real time strategic
lfempire: ah
Marti: like warcraft
that is fighting + RTS
lfempire: will we be able to modify this game, too?
Marti: not planned yet
probably not at the early stage
lfempire: ok

[...]

Marti: actually
lfempire: and thanks for the info
Marti: the recording feature
is created for a competition
we will post some goal in official website
and ask players to record their gameplay which achieves the goal
the player with the best "performance" wins
that's for 10 year anniversary of LF2
lfempire: wow, sounds great
do you already know the name of the game?
Marti: yup. but we are still working on the update.
may take a long time because we can only spend spare time to do that
the name is not yet decide
I go sleep now. nice to talking with u.
lfempire: yeah, thanks
bye
Marti: see you

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