[EDIT] SUMMARIES CONFIRMED:

Possibly. The 2ch thread’s gone absolutely insane with ｷﾀ━━━(ﾟ∀ﾟ)━━━!! ’s in response to this and they’ve been posting photos of Gundam Ace (haven’t seen this text in any of those shots yet though). Some puncuation seems to be missing from the Japanese text (there are no periods), but for the moment I’m going to assume they were unintentionally left out by an excited poster while typing up the summaries. Please keep in mind that these have NOT been confirmed as of yet and may turn out to be 2ch bullshit or trolling (and hey, they fooled the 11s too so don’t feel bad if they turn out to be fake)

[EDIT] Tiny magazine photo because 11s don’t have scanners:

 

I made lots of errors in this pass, please see the corrected versions here: 00 17-20 Summaries Revisited

Episode 18: “Mixed Feelings”

The Federation worries about fall of areas under A-LAWS jurisdiction. Tieria suggests to the Ptolemy crew that this time they should carry out a plan to take back Veda. And for that purpose, Sumeragi designs a plan centered around capturing an Innovator. 

Episode 19: “The Innovators’ Shadow”

Within the chaotic battle, Saji searches for Louise’s suit. While doing battle with Hilling who had suddenly appeared, Setsuna unleashes the power of the Twin Drive and the accelerated particles encompass the entire battlefield. 

Episode 20: “Anew Returner” (moon says “return” this might be a typo though)

Hilling and Revive appear in new suits and do battle with the Gundams. While struggling with the two new units, Cheridum is separated from the battlefield. With Cheridum’s cockpit damaged, Lyle strikes at both new suits while crying out.

Moon after the break: [EDIT] And some scans

18「交錯する想い」 

連邦がアロウズの傘下に下ったことを懸念するトレミークルーに 

今こそヴェーダを取り戻す作戦を決行すべきと進言するティエリア 

そのためにイノベイター捕獲を主眼とした作戦をスメラギは立案する 

19「イノベイターの影」 

混乱する戦況の中、ルイスの機体を探し求める沙慈 

現れたヒリングとの交戦時、刹那はツインドライブの力を解放させ、 

加速する粒子が戦闘宙域一帯に広がった 

20「アニュー・リターン」 

ヒリング、リヴァイヴと共に現れた新型機に苦戦するガンダムたち 

ケルディムと新型機の両機は揉み合いながら戦闘領域を離れていく 

損傷を受けるケルディムのコクピットで、ライルは叫びながら新型機に機体ごとぶつかっていく